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Effect of Catalase or Alpha Lipoic Acid Supplementation in the Vitrification Solution of Ovine Ovarian Tissue

2018; Mary Ann Liebert, Inc.; Volume: 16; Issue: 4 Linguagem: Inglês

10.1089/bio.2017.0122

1947-5535

Luciana M. Silva, Gildas Tetaping Mbemya, Denise Damasceno Guerreiro, Danielle Cristina Calado de Brito, Nathalie Jiatsa Donfack, Maria Luana G.S. Morais, Giovanna Quintino Rodrigues, Jamily Bezerra Bruno, Rebeca Magalhães Pedrosa Rocha, Bênner Geraldo Alves, Gary Apgar, Francielli Weber Santos Cibin, J.R. Figueiredo, Ana Paula Ribeiro Rodrigues,

Sperm and Testicular Function

Aim: The present study evaluates the effect of different concentrations of antioxidants (catalase - CAT and alpha lipoic acid - ALA) on the follicular activation and morphology, DNA damage, ROS production, and mitochondrial activity in vitrified sheep ovarian tissue. Methods: This experiment was divided into two steps. First, ovarian fragments were distributed into the following treatments: fresh tissue or control (CTR), incubation (INC), vitrification without antioxidant (VWA), with CAT (10, 20, or 40 IU mL−1) or ALA (25, 50, or 100 μM mL−1). After vitrification/warming, the fragments were additionally incubated for 24 hours and evaluated for morphology and follicular activation, as well as reactive oxygen species (ROS) levels in the culture medium. For the second step, other ovarian fragments were submitted to CTR, VWA, CAT40, and ALA100. After vitrification/warming, the fragments were incubated for 24 hours and evaluated by cell density of ovarian stroma, DNA damage, and mitochondrial and intracellular ROS levels. Results: The percentage of morphologically normal follicles in vitrified ovarian tissue in the presence of ALA in all concentrations did not differ (p > 0.05) from fresh tissue or CTRs. The percentage of activated follicles was higher in ALA100 μM mL−1 than those observed for the treatments INC, CAT (40 IU mL−1), or ALA (25 or 50 μM mL−1). The use of CAT affected (p < 0.05) the density of stromal cells (40 IU mL−1), ROS levels (10 and 20 IU mL−1), as well as DNA damage revealed by ©H2AX (40 IU mL−1). Conclusions: Although 100 μM/mL of ALA did not alter intracellular ROS, this concentration reduced the levels of ROS in the culture medium, preserved both the follicular morphology, as well as the mitochondrial activity, promoted follicle activation, and protected the follicles from DNA damage.